Engine Won't Crank
Faulty battery or charging system, starter or starter system
Seized engine
Faulty switches or accessories
Engine Cranks but Won't Start
Out of fuel or incorrect fuel. Don't trust fuel gauge.
Engine stop or kill switch is OFF
Faulty ignition system
Clogged fuel filter or fuel cap vent
Engine Cranks but Won't Start in Cold Weather
Choke setting is too lean
Ice in fuel lines, carburetors, fuel tank or fuel filter
Battery weak due to low temperatures
Incorrect engine oil
Iced up water pump due to incorrect antifreeze ratio
Engine Cranks but Won't Start When Engine is Hot
Vapor lock stopping fuel flow in lines, carburetor or fuel pump
Incorrect starting procedure
Engine Continues to Run with Ignition Off
Excessive carbon build-up in engine
Intake pipe leak
Old or incorrect fuel
Lack of power or High Speed Performance
Low battery or alternator voltage
Faulty ignition system
Intake pipe leaks
Not enough fuel
Engine valve springs weak or broken
Blown cylinder head gasket
Misfires at Idle
Dirty air filter
Incorrectly gapped spark plugs
Faulty spark plug caps
Deteriorated ignition cables
Carburetor problems
Poor Mid-Range Performance
Faulty spark plugs or Incorrect spark plug heat range
Faulty ignition system
Low engine compression
Low fuel pump pressure
Improperly adjusted throttle linkage
Incorrect engine valve adjustment
Backfires or Explosions in the Muffler
Faulty ignition system or incorrect ignition timing
Faulty engine valve timing
Lean fuel mixture due to dirt or water in the fuel or due to intake air leak
Leaky or sticking intake engine valve or weak or broken intake valve spring
Tight exhaust valves
Weak or broken engine exhaust valve spring
Burnt exhaust valve
Pre-ignition where Fuel Ignites before Spark Plug fires
Hot spot in the combustion chamber from carbon particles
Overheated engine valve, either sticking in the guide or improperly adjusted
Overheated engine
Backfires or Explosions in the Muffler
Faulty ignition system or incorrect ignition timing
Faulty engine valve timing
Lean fuel mixture due to dirt or water in the fuel or due to intake air leak
Leaky or sticking intake engine valve or weak or broken intake valve spring
Tight exhaust valves
Weak or broken engine exhaust valve spring
Burnt exhaust valve
Pre-ignition where Fuel Ignites before Spark Plug fires
Hot spot in the combustion chamber from carbon particles
Overheated engine valve, either sticking in the guide or improperly adjusted
Overheated engine
Comments
0 comments
Please sign in to leave a comment.